Arduino Mega + LCD display
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| // Arduino Mega connected to LCD display | |
| // Copyright (C) 2018 https://www.roboticboat.uk | |
| // e3cf426b-a965-47db-b9f0-5d6a717ce6b6 | |
| // | |
| // This program is free software: you can redistribute it and/or modify | |
| // it under the terms of the GNU General Public License as published by | |
| // the Free Software Foundation, either version 3 of the License, or | |
| // (at your option) any later version. | |
| // | |
| // This program is distributed in the hope that it will be useful, | |
| // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| // GNU General Public License for more details. | |
| // | |
| // You should have received a copy of the GNU General Public License | |
| // along with this program. If not, see <https://www.gnu.org/licenses/>. | |
| // These Terms shall be governed and construed in accordance with the laws of | |
| // England and Wales, without regard to its conflict of law provisions | |
| void setup() | |
| { | |
| Serial2.begin(9600); | |
| } | |
| void loop() { | |
| // Clear the screen | |
| clearLCD(); | |
| //Print text on each line | |
| selectLineOne(); | |
| Serial2.print("Line One"); | |
| selectLineTwo(); | |
| Serial2.print("Line Two"); | |
| selectLineThree(); | |
| Serial2.print("Line Three"); | |
| selectLineFour(); | |
| Serial2.print("Line Four"); | |
| //Let the screen update | |
| delay(500); | |
| } | |
| //SerialLCD Functions | |
| void clearLCD() | |
| { | |
| Serial2.write(0xFE); //command flag | |
| Serial2.write(0x01); //clear command. | |
| } | |
| void selectLineOne() | |
| { | |
| //puts the cursor at line 0 char 0. | |
| Serial2.write(0xFE); //command flag | |
| Serial2.write(128); //position | |
| } | |
| void selectLineTwo() | |
| { | |
| //puts the cursor at line 2 char 0. | |
| Serial2.write(0xFE); //command flag | |
| Serial2.write(192); //position | |
| } | |
| void selectLineThree() | |
| { | |
| //puts the cursor at line 3 char 0. | |
| Serial2.write(0xFE); //command flag | |
| Serial2.write(148); //position | |
| } | |
| void selectLineFour() | |
| { | |
| //puts the cursor at line 4 char 0. | |
| Serial2.write(0xFE); //command flag | |
| Serial2.write(212); //position | |
| } | |
| void backlightOn() | |
| { | |
| //turns on the backlight | |
| Serial2.write(0x7C); //command flag for backlight stuff | |
| Serial2.write(157); //light level. | |
| } | |
| void backlightOff() | |
| { | |
| //turns off the backlight | |
| Serial2.write(0x7C); //command flag for backlight stuff | |
| Serial2.write(128); //light level for off. | |
| } | |
| void backlight50() | |
| { | |
| //sets the backlight at 50% brightness | |
| Serial2.write(0x7C); //command flag for backlight stuff | |
| Serial2.write(143); //light level for off. | |
| } | |
| void serCommand() | |
| { | |
| //a general function to call the command flag for issuing all other commands | |
| Serial2.write(0xFE); | |
| } |